Service difficulty report · Unknown · Doug DC983

Difficulty date
March 31, 2016
Submitted
April 1, 2016
Operation
Air carrier
Aircraft
N863GA
Make and model
Doug DC983
Aircraft serial
49911
Aircraft time
54,433 hours, 35,871 cycles
Part
Unknown
Condition
Not Reported
Location
Autopilot Sys
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ON CLIMB OUT, PLATFORM 1 DATA FAIL, FIRST OFFICERS ATTITUDE INDICATOR WAS NOT STABLE & WAS ERRATIC. AUTOPILOT & AUTO THROTTLE DISENGAGED, THEN RE-ENGAGED. PROBLEM REPEATED, SWITCHED AUTOPILOT TO NR 1. FIRST OFFICERS ATTITUDE INDICATOR STILL INTERMITTENTLY ERRATIC, AUTOPILOT & ANTI-THROTTLE STAYED ENGAGED. REF LOG PAGE 677431 FOR TROUBLESHOOTING PERFORMED. CONTINUED TROUBLESHOOTING IAW AMM 22-01-05, WITH NO DEFECTS FOUND. PAGE 33 SHOWS INTERMITTENT FAILURE OF AC EMER POWER TRANSFER RELAY CAN CAUSE PLATFORM 1 & OR 2 DATA FAILURE. R & R RELAY PRECAUTIONARY IAW AWDM 24-23-00. PERFORMED RTS WITH GO ON BOTH SYSTEMS IAW AMM 22-01-05.

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